CVE-2026-50752

Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1

Published Jun 8, 2026 CVSS 3.1 · 7.4 High EPSS 4.7% KEV · Not listed
Description
A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Checkpoint
Checkpoint quantum Security Gateway
Checkpoint spark Firewalls
Vendors & Products Checkpoint
Checkpoint quantum Security Gateway
Checkpoint spark Firewalls
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.
Title Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
checkpoint
Published
Updated
Jun 10, 2026, 1:36 PM
Reserved
Jun 7, 2026, 9:42 AM
Status
Awaiting Analysis
Published
Jun 8, 2026, 12:16 PM
Modified
Jul 23, 2026, 7:10 AM